Transmission-gear-shifting device.



G. DE WETT,

TRAESMSSION GEAR SHIFTING DEVICE.

APPLICATION FILED JUNE 5, 1913. ,I 1,123,852?, Emma Jan. 5, i915.

5 SHEETS-SHEET 2..

G. DE WITT.

mmsmsslor: GEAR SHIPTING 1mm.

APPLEGATION FILED .TUNE 5, 1913. Y l

Paente Sain, 5, i915.

5 MEETS-SEEN s.

MORNEY n G DE WITT. TRANSIMSSION GEAR SHIFTNG DEVGB. APPLICATION BILB'DJUNE 5, 1913.

Patented Jan. 5, 1915.'

5 SHEETS-SHEET 4.

lNVENTOR features of construction and TEXAS, ASSIGNOR OF ONE-THIRD TO L.B. MUNGR TRANSMISSIN-GRSHIFTING DEVICE.

Specification of Letters Patent.

Patented Jan. 5, i315.

nppcation led June 5, 1913. Serial 1T o. 771,8512.

To all wiwi/.oit may/concern:

Be it hnonin that l, Grenen Dn W'rrr, a citizen of the United States,residing at Houston, in the county of Harris and State of Texas, haveinvented certain new and useful -lniprovements in Transmission-Gear-Shifting Beviees, of which the following is a specification.

This invention las specified relates to transmission gear shittingdevices.

The object or" the invention, primarily, 1s. to vprovide means forshittingv the trans inission'parts oiE an automobile or other motordriven v cle, Without employing the and levers and appliances, and to sooy nnan of electrically controlled operating mecha msm in combinationwith certain component parts, an example of which will be hereinafterdescribed.

Another ohject of the invention. is to locate circuit vclosing meansforthe electrically controlled operated mechanism, on the steering Wheel orin convenient reach of the operator.

Among other objects are the provision; oiu means for holding the partsin a selected position; means for positively and automatically returningthe parts to neutral or normal position Whenever any of said parts arereleased from a selected position; and means for loclring thetransmission shifting connections in position; preventing of theoperation of more than one at a time, and makving it necessary for oneot said connections to returnto neutral before the other can furtherohjec.J of the invention is to provide a device of the characterdescribed that will loe strong, durable, eliicient, andsimple 'andcomparatively inexpensive to construct, also one in which the severalparts Will not he likely to get out or" .vorlring order.

`With the above and other objects in view the invention has relation tocertain novel operation, an example ot1 'which is described in thefollowing specification and illustrated in the accompanying dranv'ings,wherein:

Figure -l is a longitudinal sectional view of the operating mechanism,Fig. 2 is a plan vienY of tho same, Fig. 3 is a transverse verticalsectional view on the line Xf of Fig. l, `Fig. s a t ansverse yerticalsectional view, on the line i-- of Fig. l,Fig. 5 is a detail l0 isconfined on the portion e.

'pressi of the transmission links, Fig. t3 is a side elevation of aslightly modified form, the casing being shown broken away, Fig. i' is aplan view of the same,'F ig. 8 is detail. sectional View of themotordrive mecha' nism, F ig. 9 is a sectional View taken on the lineS-S of Fig. 8, Figli?, is a detailed section' on the line Y-Yof Fig. 8,Fig. 1l is a diagrammaticil View of the. circuits em ployed, Fig. l2 isa detail in section of the s switch buttons and their mounting, and Fig.13 is a sectional detail of one of the switch buttons. Y

In the drawings the numeral l designates the clutch shaft of an ordinarytran sion mechanism, and 2 the drive shaft. usual gears and parts arearranged transmission casing 3. The transiti shifting arris t and 5 haveconnection .v shifting rods G. In the type of trans mechanismillustrated there is prov shifting the gears to give three speeds alieand one tothe rear. This is accompli by swinging the arms 4 and 5. eacheffecting one shift when swung fornfard another shift when swungrearward.

The rods G terminate in upturned slidably receiving the yoke-shaped po 8of operating rods 9. The extreaii these portions are turned doivn andsl' embrace the rods G as is shown On each si de of each lug 7 a co nsprings be 1r on opposite sides oi' said l and exert suiiicient pressureto normally refl tain the lt'g in a-central position. l1? thetransmission gears hang and otter resistzmc` to the reciprocation of therods 9. the so will be compressed and will yielr until to obstruction isremoved, after which the parte 'Will Work under normal conditions.

lt is obvious that only one rod 6 should be moved ai; a time and to lockthe other rod against operation, a rocking locking device is provided.Therods 6 are disposed an elongated casing 1l contracted toward its rearend Wit ich is in proximity to the transmission casing 3. At the rearextremity out the'casing 1Il a housing 12 is orovided a il the rods 6pass through this housing as A' shown in F igs. l, 2 and 4. Each rod ha.conical depression 14 in that part through the housing. A pair oiplungers fi are mounted ver in the irousing over the rods and each plaEiSSUEi i ends projecting` ger has its lower end point'edfand adaptedtoA ride linto and out of the depressions. The upper ends ofthe plungersare pivoted to the extremities of a rocking lever 16 cen- Itrallypivoted on a post 17 mounted on the j housing 12.

Normally with the parts atV neutral the plungers each have their pointedabout half way into the depressions 14... f either rod is reciprocated,the plunger thereofrides out of its depression onto the surface of therod, whereby the other plunger is forced to the bottom'of its depressionand its rod cannot be reciprocated L until the first rod is returned toneutral.

- has ail-shaped guide 21 in itstop termin-ating atv each side in` horns22, asshownin 'Figs l and 2.

Each rod 9 has a vertical loop 23 in which a. roller 24 is mounted. Thisroller.pro'jects onto the surfaces of the guides 21 and has projectingends or trunnions about which .the upper ends of coiled springs 25 arecon` lined. The lower ends of the springs are attached to eye bolts 26projecting through Jthe bottom of thel casing 114 and receiving exteriorthumbnuts 27. By screwing u'p the nuts 27 vthe springs are placed undertension whereby the rollers are drawn tothe bottoms of the guides 2l. lI f a rod 9 is moved,

its roller 24 rides up the `inclined faces at one cide'of the g-uides21, the horns 22 acting as stops to retain the roller in the guide at4.novel featureis to effect this operation by the enl of its upwardmovement.

It is obvious that as soon as a rod,9 is released the springswillreturn' the roller and rod to normal or neutral position whereby the"transmission parts are returned to neutral.

' One of the novel features of this invention is mechanism forreciprocating the rods- 9 forward and rearward whereby the transmission.gears are shifted and any of the positions -or speeds, selected. Anotherelectrical means set into 'operation by merely pressing a buttonandoperating the clutch pedal. The forward portion of the casing 11'isenlarged and a shaft 28 is journaled transversely therein. This shaftprojects on each side of the-casing as isshown in Figs2and 3. .Y

.A T-shaped actuating member 29 is fixed centrally to the shaft 28within the casing 11. ourvspaced brackets 3() are fixed on the upperhorizontal portion ofthe actuat-l ing member. Two such brackets are usedin connection with each operating rod 9 and the number `of brackets maybe increased or diminished according to the number of rods employed.Each bracket has fixed.

therein, an electro-magnet 31. Each magnet has an armature lever 32-pivoted in its bracket and projecting below the horizontal portion ofthe actuating member., Each magnet carries afcoiled spring 33 bearingagainst the upper end of the correlated ar.- mature lever32lwhereby thelatter is nor- `mally held away from the core of the magnet. A pluralityof arms are loosely con-l fined on the shaft 28.' 'Two of said arms 34:

and 35 respectively are' mounted at their low ends and extend upwardfrom the shaft;

.awhile the other two arms 36 'and 37 respectively, are centrallypivoted on said shaft.'

and extend above and below the latter. The

upper ends of the arms terminate in substantially the same horizontalplane and each carries a rigid forwardly projecting ,double hook 38. Apair of links 39 are pi# oted to the forward end of each operating i rod9. These links are directed upward and downward,- thel upwardly directedlinks 'being pivoted to the arms 34 and 35 and the downwardly directedlinks being pivoted to arms 36 andl 37 at their lower ends. The linksare bent to make these connections and it is apparent that each rod 9has connection with diverging links above andbelow its longitudinalcenter'.` By swinging one of the arms'connectedtoa rod the latter willbe moved forward and upon swinging the other. arm of said rod the latter'will' be moved rearward. It is obvious thatvwhen one of the rods 9 ismoved the. link'4 or '5 connected thereto, will be swung and whenv saldlink 1s swung rearward one gearV selection will :be made; while anothergear selection will be effected when the samelink is y swung forward,the roller 211 returning the parts toneutral vbetween each selection.The arms being looselyconfined on the shaft 28, ,are free to be swungand thus if the arm 35 is swung lforward the lower end of the arm 37will likewise be 'carried forward and the rody 9 moved forward. 'Shouldthe "upper end of the arm 37 be moved forward its lower end and the link39 connected thereto, will be swung rearward; the -other link swingingthe arm'35 rearward, andthe rod 9 thus being moved rearward.

The hooks 38.1 are vnormally under the armature levers 32 so that-shouldthe circuit through a magnet 'be closed its armature lever will beattracted and swung whereby' its lower end is moved downward. Under thiscondition the 'upper side of -the correlated hookwill bein the path ofsaid'lever and when thel actuating member 29 is swung forwa'rd ythevlever will engage vthe-hook and swing the correlated.4 arm` forward.'yLA.

small shaft 4 0 is mounte `tra-nsversely of the casing neartheforward'end'and, a latch y Ewhich is accomplished byclosing the cir-Aat aise

41 is hinged on this shaft. This latch has such a width as to be engagedby the underside of any of" the hooks 38 when the latter is swungforward. rEhe latch has a depend ing armature 42 normally displaced froman electro-inagnet 43 by a coiled spring 44. coiled spring 45 is cuitthrough the magnet 43 whereby the armature 42 is attracted and the latchswung down. Upon releasing the hook the neutralizer will return the armsto normal iosition throuffh the aOfenc of the links 39.

ri h

vFor returning the actuating member to normal position after one ofthe-hooks has been disengaged from the latch a crank-arm 46 is Xed onthe projecting end of the shaft 28 and connected to one end of a coileds rinv4' which has its other end attached' to a bracket 48 projectingfrom the side the casing as shown in Fig2.

Before shifting the transmission gears it is necessary to disconnect theclutch shaft 1 from the engine in order to prevent stripping"7 the gearteeth. In the several figures of the drawings the numeral 50 designatesthe usual clutch pedal which is connected to the clutch 51 and operatesin the usual way. Above its pivot point the jof 'clutch pedal has alimited sliding connection with the forward end of a pitman 52 which ispiroted at its rear end to 'the outer end of an arm 53 lined in theprojecting end of the shaft llilhen it is desired to shift thetransmission gears the pedal is pushed forward wh ebv the actuatingmember 29 is swung. thc sliding connection between the pitman 52 and thepedal permitting said 'pedal to disengage the clutch priorto theswinging of the actuating member.

l'n Fig. 'l1 l have shown a circuit diagram the several parts beingindicated by the numerals heretofore applied to them. To

closethe circuits and energize the magnets I employ a plurality ofpushbuttons 55 which may be mounted at any convenient' place and in Fig.12 l have shown them-r mounted in the rim 56 of a steering' wheel. Oneof the contacts of each button 55 has connection with one side lof abattery' A' or other source of electro-motive force, by means of a wireB. A button provided for cach magnet 31 and connected therewith by awire (1 rl`he release magnet 43 is connected in multiple with themagnets ,ser

obtain a certain' speed ratio, the driver' presses the button 55 whichbears the designation of the speed'desired. This closes the circuitthrough the correlated magnet 3l. As an example we will suppose that abutton is pushed to close the circuit through the magnet at the lefthand of Fig. 3, which magnet is shown also in Fig. 1- and at the" bottomof F ig. 2. rlhe magnet being energized attracts its armature lever 32whereby the lower end of the latter is swung downward. The driver nowpushes the f ot pedal 50 forward which disengages 1e clutch 51 and aftertaking up the lost motion of the pitman 52,due to slotted connection,swings the-.shaft 2S forward. The hooi: 38 of the arn d4'` being in thepath of the said armature lever will be engaged by the latter, as theshaft swings the actuating member 29 forward. The arm 34 being swungforward pulls the rod 9 forward by means of the correlated link 39, therofd pushing its other link 39 forward which swings the arm 3 6 idly.The rod 9 being displaced forward carries with it the rod 6 which swingstheearm 4 o f the transmission mechanism, the latter` shifting thetransmission gears into the position desired. is the rods'are displacedthe roller 24 associated therewith rides up the inclined faces of theguide 2l. The arm 34 is carried forward until itshook is over. the latch41. When the circuit through the magnet 3 1 was closed the` circuitthrough the release magnet 43 was also closed and if any of thehooks 38were in enffageinent' with. the i latch 41`it would be released andtheneutralizer would return the arm ofA said hook and other parts, toneutral before the se lected arm 34, 35, 36 or 37 was moved forward. Thedriver holds the circuit closed until the shift of gears hasbeen-completed which requires but a fraction of a minute. Afterreleasing the push button the pedal 50 is held forward in order that.the magnet 43 may release theA latch 41 and permit its spring 45 todraw said latch into engagement with the under side of the hook 38,after which the pedal may be released.

When the pedal is released the clutch is` engaged and the spring'47returns the shaft 28, actuating member 29 and pitman I52 tov theirnormal position. The hook 38 of the arm 34 being held by thelatch 41causes the selected position of the transmission gear I' tobe'mainta'ined until'ancther button is de-` swung, t e rst arm isreturned and the parts lpressed. Any button being depressedcloses thecircuit through the releasemagnetv 43v which releases the latch 4:1 andany-hook and its correlated arm which is being held by said latch.,IWhen the hook and'arm are guide whereby the rods 6 and 9 are returned tonormal or neutral position, the parts connected to said rods then'beingreturned to neutralposition. lt will be 'seen that .if one of thearms34, 35, B6-or 37 has4 been swung forward and the transmission gearsshifted, before said gears can be shifted into another osition and oneof the other arms automatically returned to neutral. This ar rangementprevents damage to the gears and establishes an automatic neutral pointbetween each shift thus relievingthe driver of the responsibiiity Thelocking plunge'rs 14 lock the rod 6 which has not been operated and thusonly one'rod can be shifted at a time. f In Figs. 6 to 10 :inclusive Ihave illustrated a motor connection for swinging the shaft 28 and whenthis attachment is used the pitman 52 and arm 5B connecting with theclutch pedal 50, are omitted. As shown in Fig. 7 a suitable motor 60 issecured to the 'side of the casing il and has driving connection withscrew 6l located under the shaft 28. A gear casing 62 surrounds theshatiZd and incloses a worm gear ring 63 which meshes with the screw 6las is shown in Fig. 8. ine gear has annular internal` shoulders eachside oi: its inner periphery. Tearing'plates- 65 secured vto the wallsof the casing b2, engage in these shoulders and support the gear .ring63 which free to revolve. A sector is cut out of each plate'and thesolid portions of said plates are connected by web 'A housing 67 islkeyed on the shaft 28 within the cut out portion the plates" andextends radially as shown in F ig. 8. As shown 1n Fig. 9 'the shaft 28has a recess 68 from which a shaft 69 extends longitudinally through theshaft 28 and is arranged to turn freely therein. A crank arm '70 isfixed on the projecting end of the shaft 69 and ispivoted to anactuating rod 7l which extends to 'within easy reach of the driver. Arocker jaw 76 is in the path 0f the lug `leased. y

.In Fig. ll the motor circuit is indicated.l yFrom the battery Aconnection is had with motor circuit the gear is causedto revolve.

` The driver desiring to 'select a transmission speed pushes the properbutton and, closes the circuit through the motor, by

I mea-ns hereinafter described, and also pushes released the springs 25being under, tension, 4 pull the roller 2d down inclined faceso-tlie earmature lever 32 having been lowered the parts are new ready for theswinging of the shaft 28.' The driver now operates the rod 71 'wherebythe shaft S9 is rocked and the plunger 73 forced outward so that its lugcoming into contact with the Jaw swin s the plunger and its housing 67to the le ,f yrefe'rence being had to Fig. 8. Fig. 8 lbeing 77.l The aview looking from theupper side of -F ig.

7 it will be seen that the housing and plunger 'are swung forward, thusswinging the actuating member 29 and its correlated parts forward andeffecting the shift of gears as hereinbefore described. When the housing67 contacts with the web 66 a stop 78 carried by said web enters thehousing through a slot 79. The outer face of the stop is inclinedinwardly and downwardly tion without injury to the parts. The button 55is released thus breaking the circuit through the magnet 3l andpermittingthe actuating member, housing 67 and plunger to be returned tonormal position by the spring 47. After the circuit through the magnet31 is broken the foot, pedal is rethe motor 60 by a wire E andA from theother contact ofthe motor a wire F leads to a set of buttons 90, fromthe other contacts of which a wire Gr leads to the battery By pressingany one of 'the buttons 90 the motorV circuit isclosed,l The buttons arelocated directly under thebuttons 55 in the steering wheel 56 as shownin Fig. l2. From this it is apparent that the upper but-v tons 55 may bepressed by the thumb and sion mechanism, a neutralizer directlyconnected to the operating members, an actuating meinber, and means forelectrically es- 'tablishing selectedJ-'fconiiection between theIactuating memberjn'nd any of the operating members.l 2, in 'anelectriegear shifter, `a plurality ,iso

of operating members arranged for connection to the shifting elements ofa transmission mechanism, a neutraliser directly connected to tlieoperating members, an actu.- ating member, means for electricallyestablisliing selected connection between the actu-4 ating member andany of the operating members, and means for operating the actu atimember. 3. ln an electric gear shifter, a plurality of operating membersarranged for connec- "o to tbe shitting elements of a transmissionmechanism. a neutralizar directly conneet-sil to tbe operating members,an actu- `ng member. means for electrically estabselected connectionbetween the actul member and any of the operating ters, means foroperating the actuating "f member to normal position.

an electric gear shifter, a plurality g members arrange for connec- Jotbe shifting elements of a transmis- .,n. n mechanism, a neutraliserdirectly con- :ft-efl to the operating members, an actumember, means forelectrically estabiing selected connection between the actu.-

member and any of the operating ,a embers, and means for liolding theselected mperating member in its operated position.

an electric gear shifter, a plurality operating members arranged forconnection t, tbe shifting elements ot a transmis- -sion mechanism, aneutralizer directly con- ;-is nected to the operating members, anactuating member, means `tor electrically estab-- lisliing selectedconnection between the actuatirlr member and any of tbe o'nerating `snmeans for holding the selected member in its operated position leans iorreleasing the selected opernieniber from its operated position.

an electric gear shifter, a `plurality ing members arranged for conneceac i to shifting elements of a transmis- --eelianism, a nentralizerdirectly conne to the operating members, an actumember, means forelectrically estabg selected connection between the actuf iber and anyof the operating qs, means for operating the actuating means forreturning the actuating normal position and means for returning theactuating i niber and means for returning the actus operating tbeactuating -with the shifting members, and electrically operated mea ,s'for selectively establishing operative connection between the shittingmembers and tbe act ating member.

9. ln an electric gear shifter, a l of operating members tion to tiesluiting sienA sion mechanism, a nlnral' ing members connected Amembers, an acting mem e- Witli the shitting members, electricallyoperated means for selectively establisliing oper-- ative connectionbetween the shitting niembers and the actuating members and forswinging'tbe actuating member.

l0. ln an electric gear sliii'ter, a pinraity of operating members geclfor connection to the shifting elements a transmission mechanism,l aplurality ot pirated. shifting members connected to tbe operating`members, an actuating member associated with tlie shitting ,membersAelectrically operated means for selectively establisbing operativeconnection between tbe shifting members and tbe act ating menibers,means for swinging the actuating member, and means for holding tbesliiting members in their operated position.

ll. in an electric gear sliii'ter, a plurality of operating membersarranged for connection to tbe shifting elements of a transmissionmechanism, a plurality of pivote shitting members connected to tbeoperating members, an actuating member associated with the shiftingmembers, electrically operated means for selectively estaolisbine;oigeratire connection between the shifting members and the actuating lmembers, means for swingingl the actuating member, means for holdingtlie shifting menibers in their onerated position, and means forreturning the actuating member to its normal position.

l2. In an electric gear shifter, a plurality of operating membersarranged for inection to the shifting elements of a transmissionmechanism; a. plurality of pivote-fl shift.- ing members connected tothe operating members, an actuating member associated with tbe shiftingmembers, electrically operated means for selectively establishingonerative connection between tbe shitting members and tbe actuatingmembers, means for swinging the actuating member, means for holding theshifting members in their operated position, means for returning theactuating member to its normal position,

' and means for releasing the selected shifting member from its heldposition.

13. In an electric gear shifter, a plurality of operating' mjembersarranged for connection to the shifting elements of a transmissionmechanism, a plurality of pivoted shifting members connected to theoperating members, an actuating member associated with the shiftingmembers, electrically operated means for selectively establishingoperative connection between the shifting members and thefactuatingmembers, means for swinging the actuating member, means for holding theshifting members in their. operated position, means for returning thevactuating member to its normal position, means for releasing theselected shifting member from .itsheld position, and means. forreturning the -operating members to neutral.

'14. In, an electric gear shifter, a plurality of operating membersarranged 'for connection to the shifting elements of a transmissionmechanism, a plurality of pivoted shiftingmembers connected to theoperating members, an actuating member associated with theshiftingvmem'bers, electrically operated means for selectivelyestablishing operative connection between the shifting members and theactuating members, means for swinging the actuating member, and meansvfor locking the operating member against operation. 15. In an electricgear shifter, a plurality ofoperating members arranged for connection tothe shifting elements of a transmission mechanism, means forautomatically returning the operating members to neutral after eachoperation, an actuating member, means for electrically establishingselected connection between the operating members and the actuatingmembers, and means for operating the actuating member.

16. In an electric gear shifter, a plurality of operating membersarranged for connection to'the shifting elements of a transmissionmechanism, means for automatically returning the operating members toneutral after each operatioman actuating member, means for electricallyestablishing selected connection between the operating members and theactuating members, means for operating the actuating member and meansfor holding the selected operating member in itsoperated position.

17. In an electric gear shifter, a plurality of operating membersarranged for connection to the shifting elements of a transmissionmechanism, means vfor automatically returning the operating members toneutral -after each operation, an actuating member,

means for electrically establishing selected,

. operated position, 'and electrically conniaaaf:

connection vbetween the operating members and the actuating members,means for' operating the actuating member, means for holding theselected operating member in its trolled means for releasing theselected operating member arranged to operate simul- `taneously with themeans for electrically establishing connection 'between the actuatingmember .and the .operating members.

determined arm.

19. In an electric gear shifter, a plurality Aso" of operating members,a neutralizer connected to each operating member, a plurality of pivotedarms having pivotal connection With-the operating members, an actuatingmember adjacent the arms, electrically controlled means for establishingconnection be- I tween the actuating member and a predetermined arm, andmeans for swinging the actuating member.

20, In an electric gear shifter, a plurality of operating members, aneutralizer 4connected to each operating member, a plurality of pivotedarms having. pivotal connection with the operating members, an actuatingmember adjacent the arms, electrically controlledmeans for establishingconnection between the actuating member and a predetermined arm, meansfor swinging the actuating member and means for returning the actuatingmember to normal position independently of the selected arm.

21. In an electric gear shifter, a plurality i of operating members, aneutralizer connected to each operating member, a plurality of pivotedarms having pivotal connections ber and adapted to depend into the pathof the shifting member.

23. In an electric gear shifter, a rock shaft, an actuating member fixedon Vthe shaft, a plurality of magnets mounted on the actuating fmember,a plurality of shifting with the operating members, an actuating.members nii/ated on the siia; a shifting; member being' associated Wieneach magnet, and an armature-leech pi'v'eed en be ectaaeing' memberadjacent te eacii magnee.j a la ch being' provided for each sbifingineinber and adapted to be swung inte eine pain thereof when itsi'espeeiive magnei; is energized.

24. n an electric gear shifter, the combination with a clutch pedal andthe shifting elements of transmission gearing", of means for selectivelyshifting the gears comprising a pivoted shaft adapted to be rocked bytbe clutch pedal, means mounted on the shaft and having connection withthe shifting elements for operating the same, and means for electricallyestablishing selected connection between the clutch pedal and theshifting element operating means.

25. In an electric gearshi'er, a rock shaft, an actuating arm fixed onthe shaft, a

plurality of magnets Carried by the arm, a

plurality of shifting members pivoted on the shaft and one correlatedwith each mags e, ne,

neti arma laten be' iatcii iaciies pvoined en ehe aina f previ-deci eaebmagnei e a pei'eien adapted te e members, and a pinning? ene eenziected'e each leien a f' Lbe iacb. e" of ie shifting niembeiu a eeczrie geni'sbiiceei", the eenibi iansmiss i sliiftii menev airanged ce rein e te, aplurali y ai'ms piveed and connected wit-ii Elie sini ing element forepeia-ingthe same, a pedai, and electrically operated means coinpfisinga plurality of magnetic catches for establishing cennection between thepedal and selected arms.

In tesimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses.

GEGRGE DE VITT.

Witnesses:

L. J. FORTASSAIN, A. H. MANSFIELD.

